There’s a whole bunch on YouTube.
bprp (= black pen, red pen. He has multiple channels of varying difficulty), Prime Newtons, Sybermath / a+bi, Andy Math and Michael Penn to name five. One or more of their respective styles or their level might not be right for you, but watch a few anyway and you might get recommendations for other channels that you like better.
If you like popular or recreational mathematics, Numberphile is a long-running channel with hundreds of videos, and relative newcomer Wrath of Math is doing numbers (in more than one sense) at the moment.
I’m pretty sure that if you use elevated privileges to run commands you don’t understand, you can break Windows just as much as you can break Linux. Windows might pop up an extra “Are you sure?” box or two though. It’s been a while since I did anything on that OS.